30136445861 has 2 divisors, whose sum is σ = 30136445862. Its totient is φ = 30136445860.

The previous prime is 30136445837. The next prime is 30136445863. The reversal of 30136445861 is 16854463103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29422540900 + 713904961 = 171530^2 + 26719^2 .

It is an emirp because it is prime and its reverse (16854463103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30136445861 is a prime.

Together with 30136445863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30136445863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15068222930 + 15068222931.

It is an arithmetic number, because the mean of its divisors is an integer number (15068222931).

Almost surely, 2^30136445861 is an apocalyptic number.

It is an amenable number.

30136445861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30136445861 is an equidigital number, since it uses as much as digits as its factorization.

30136445861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 30136445861 in words is "thirty billion, one hundred thirty-six million, four hundred forty-five thousand, eight hundred sixty-one".